pub fn new_birthday_probability(n: u32) -> f64 {
    // TODO: 这里写逻辑
    //todo!()


    let res : f64 = 1.0;
    let mut fenzi : f64 = 1.0;
    let mut fenmu : f64 = 1.0;
    for i in 0..n{
        fenzi *= (365 - i) as f64;
        fenmu *= 365 as f64;
    }
    let  res = res - fenzi / fenmu;
    res

}
